Mumbai, Jul 8 (IANS): Wrestling champion and veteran Bollywood actor Dara Singh remains critical, a doctor said Sunday.

Dara Singh, 84, was taken to the hospital Saturday following a severe cardiac problem.

"He is still extremely critical. He is under high dose of medication. I would not say he is stable," Ram Narain of Kokilabain Hospital told IANS.

"We are still trying to find the exact reason... He came yesterday with no pulse and low BP (blood pressure). We have to keep him on ventilator to get his BP and oxygen stable. Right now he is very serious," he added.

Dara Singh, who won the title of Rustam-e-Hind in wrestling, entered movie world in the 1960s.

He appeared in various films such as "Watan Se Door", "Daada", "Rustom-E-Baghdad", "Sher Dil", "Sikandar E Azam", "Raaka", "Mera Naam Joker" and "Dharam Karam". He was last seen in a 2007 release "Jab We Met".

He also featured in mythological television shows "Ramayana" and "Mahabharat".

Apart from acting, Dara Singh also tried his hand at direction.